hoek versions prior to 8.5.1, and 9.x prior to 9.0.3 are vulnerable to prototype pollution in the clone function. If an object with the proto key is passed to clone() the key is converted to a prototype. This issue has been patched in version 9.0.3, and backported to 8.5.1.
Versions of hoek prior to 4.2.1 and 5.0.3 are vulnerable to prototype pollution. The merge function, and the applyToDefaults and applyToDefaultsWithShallow functions which leverage merge behind the scenes, are vulnerable to a prototype pollution attack when provided an unvalidated payload created from a JSON string containing the proto property. This can be demonstrated like so: var Hoek = require('hoek'); var malicious_payload = '{"proto":{"oops":"It works !"}}'; var a = {}; console.log("Before …